EP2625548A1 - In situ system for the direct measurement of an alpha radiation, and related method for quantifying the activity of alpha-emitting radionnuclides in a solution - Google Patents
In situ system for the direct measurement of an alpha radiation, and related method for quantifying the activity of alpha-emitting radionnuclides in a solutionInfo
- Publication number
- EP2625548A1 EP2625548A1 EP11767996.9A EP11767996A EP2625548A1 EP 2625548 A1 EP2625548 A1 EP 2625548A1 EP 11767996 A EP11767996 A EP 11767996A EP 2625548 A1 EP2625548 A1 EP 2625548A1
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- EP
- European Patent Office
- Prior art keywords
- effluent
- alpha
- detectors
- radiation
- alpha radiation
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- G01T—MEASUREMENT OF NUCLEAR OR X-RADIATION
- G01T1/00—Measuring X-radiation, gamma radiation, corpuscular radiation, or cosmic radiation
- G01T1/16—Measuring radiation intensity
- G01T1/24—Measuring radiation intensity with semiconductor detectors
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01T—MEASUREMENT OF NUCLEAR OR X-RADIATION
- G01T7/00—Details of radiation-measuring instruments
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2223/00—Investigating materials by wave or particle radiation
- G01N2223/60—Specific applications or type of materials
- G01N2223/626—Specific applications or type of materials radioactive material
Definitions
- the invention relates to the in situ quantification of the activity of alpha emitting radionuclides present in an effluent by a non-destructive alpha radiation measurement system and its associated measurement method.
- the measurement of alpha radiation has a certain advantage, compared to the measurement of gamma radiation, to have a much lower detection limit and to overcome complex attenuation corrections.
- an effluent designates any liquid discharge conveying a polluting charge (dissolved or in the form of particles) harmful to the environment.
- Effluents include, for example, all treated and untreated wastewater from a water treatment plant (eg sewage or industrial waste). It is recalled that the orders of quantities sought for such quantifications vary from a few hundred Bq / m 3 to 1.10 5 Bq / m 3 on the U, Pu, M radionuclides.
- the quantification of the alpha activity of the effluents is done in several stages: taking a sample volume of effluent, transporting this sample to an analytical laboratory and, once arrived at the laboratory, taking part of the volume of the effluent. sample to analyze it.
- the analysis is carried out by making a deposit on the sample volume cup. It is recalled that the deposit on the dish consists of evaporating a liquid by heating.
- the residues deposited on the cup at the end of the manipulation are measured and the alpha activity of the residues is quantified, for example using a gate counter type detector or a PIPS silicon type semiconductor detector (for "Passivated Implanted Planar Silicon"). " in English) .
- This process generally involves the use of a radioactive tracer, which implies a supply of reference nuclear materials and a generation of additional nuclear waste.
- the inventor therefore set himself the goal of designing a system and a measurement method that make it possible to quantify the alpha activity of an effluent non-destructively and in situ, in solution.
- alpha radiation detectors intended to be immersed in the effluent and capable of measuring alpha radiation emitted by said effluent, M being an integer greater than or equal to 1;
- P being an integer, greater than or equal to 1 and less than or equal to M, each of the P measurement channels being able to provide a value or a sum of the values of alpha activity resulting from the alpha radiation detector (s) to which they are connected;
- system further comprising, if P is greater than 1, means for adding the results from the P measurement channels, and wherein the M alpha radiation detectors are individually calibrated by a Monte Carlo-based particle transport code, the alpha radiation detectors connected to the same measurement channel being calibrated in the same manner.
- the semiconductor diamond detectors of CVD type or diamond-coated silicon are respectively diamond detectors obtained by chemical vapor deposition, or SOI type detectors (for "Silicon On Insulator”) mono or polycrystalline on which a layer of diamond obtained by chemical vapor deposition has been deposited. In no case can they be non-selective detectors with respect to alpha radiation. For example, an HPGe type gamma radiation detector (for "Hyper Pur Germanium”) would not be suitable.
- the principle of detection of a particle is the formation, in a semiconductor detector, of electron-hole pairs following the impact of the particle a on the surface of the detector.
- the number of electron-hole pairs depends on the energy of the particle a, which makes it possible to obtain an energy spectrum.
- the sensors SOI for "Silicon On Insulated” in English
- the detectors CVD for "Chimical Vapor Deposition” in English
- the means for adding the results from the P measurement channels can be, for example, a conventional multichannel analysis counting scale.
- the alpha radiation detectors are individually calibrated by a Monte Carlo-based particle transport calculation code, the alpha radiation detectors connected to the same measurement channel being calibrated in the same way.
- the Monte-Carlo method is a statistical method of calculation which allows us in this case to numerically determine the calibration coefficients of the alpha radiation detectors.
- M is greater than or equal to
- the measurement system then comprises at least two semiconductor detectors of the alpha radiation.
- P is equal to M.
- each of the alpha radiation detectors is thus calibrated individually. It is thus possible, for example, to obtain the gradient of the alpha activity of the effluent and a specific calibration by effluent phases taking into account the physicochemical characteristics of each of the phases of the effluent.
- the measuring system comprises at least a detector of alpha radiation by phase effluent.
- the M detectors of the alpha radiation are identical. This makes it possible to directly compare the results obtained by these M detectors alpha radiation without having to make additional calculations, for example to identify the presence of a gradient of activity.
- the measurement system according to the invention furthermore comprises a monocrystalline semiconductor detector, called a spectrometry detector, intended to be immersed in the effluent and making it possible to identify and quantify the proportion of the elements that emit activity. alpha present in the effluent.
- the monocrystalline semiconductor detector is chosen from a semiconductor CVD or SOI diamond detector.
- a specific device is positioned in front of the detector. For example, it is possible to equip the detector dedicated to spectrometry with a channel passing an effluent slide of micrometric thickness in front of the latter. Thanks to the information provided by this detector dedicated to spectrometry, we can then know the alpha activity of each alpha emitter element contained in the effluent.
- an alpha radiation detector is monocrystalline, is connected to a first measurement channel, selected from the P measurement channels, which provides a value of 1 alpha activity and is connected to a second measurement channel, different from the P channels of measurement, which provides the spectrometry of the effluent.
- the same detector serves both as an alpha radiation detector and a spectrometry detector.
- the detector will necessarily be a semiconductor monocrystalline or SOI diamond detector.
- the measuring system according to the invention further comprises holding means for maintaining the M alpha immersed radiation detectors and at specific positions in the effluent.
- the holding means maintain at least two alpha radiation detectors at different heights in the effluent.
- the means for maintaining the M alpha radiation detectors are a tree (for example an axis) having branches at which the M alpha radiation detectors are arranged.
- the M alpha radiation detectors are located at the ends of the branches. Preferably, there are ramifications.
- the branches are movable on the tree; the distance between the branches can thus be modified and the alpha radiation detectors can thus be moved to be fixed at a more satisfactory height in the effluent.
- the spectrometry detector is attached to one of the holding means.
- the holding means is a tree with branches, this tree may comprise a additional branching on which will settle the monocrystalline detector of spectrometry.
- the monocrystalline detector or diamond SOI spectrometry is disposed in the upper part of the effluent volume, that is to say in the part of the effluent the most free of particles in suspension.
- the invention also relates to a method for the in situ nuclear measurement of the alpha radiation of an effluent.
- This measuring method comprises the steps of:
- M semi - conductor diamond detectors of CVD type or silicon coated with a layer of diamond able to measure the alpha activity of the effluent, M being an integer greater than or equal to 1, the M detectors alpha radiation being connected to P measurement channels, P being an integer greater than or equal to 1 and less than or equal to M, said M semiconductor detectors being called alpha radiation detectors;
- the values collected correspond to the values obtained by the alpha radiation detectors, each detector of the alpha radiation then having its own measurement path: the values collected by the P measurement channels are then not sums of values from several alpha radiation detectors, but the values coming directly from each detector.
- the M alpha radiation detectors are arranged at different heights in the effluent.
- the effluent comprises Q different phases, Q being an integer greater than 2, at least two alpha radiation detectors are immersed in different phases.
- the M detectors are arranged in such a way that there is at least one alpha-radiation detector in each phase of the effluent.
- the measurement method further comprises a step of performing an effluent spectrometry to determine the identity and the proportion of alpha emitting elements present in the effluent.
- the step of carrying out the effluent spectrometry is carried out by immersing a monocrystalline semiconductor or diamond-coated silicon (diamond SOI) detector (i.e., a detector equipped with for example, a micrometer channel) in the effluent and collecting the values provided by said monocrystalline semiconductor detector or in silicon coated with a diamond layer (diamond SOI).
- a monocrystalline semiconductor or diamond-coated silicon (diamond SOI) detector i.e., a detector equipped with for example, a micrometer channel
- the device and the method according to the invention make it possible to improve the quantification of the alpha emitters present in the radioactive effluents.
- the solution for solving the problems of the prior art consists in immersing directly in the effluent to be characterized from one to several alpha radiation sensors which are calibrated numerically, individually, specifically and with each modification of the physicochemical properties of the effluent phase in which they are immersed without removing the said sensors from the effluent.
- the originality of the invention is to combine one or more alpha-ray detectors of the CVD or SOI diamond type, placed in situ in the effluent (the number of detectors being adjustable depending on the volume of effluent to be characterized and the heterogeneity of the latter), the coupling of the detector (s) to a measurement channel providing alpha emitter spectrometry present in the effluent, the quantification of the alpha emitters by means of a digital calibration specific to each of the immersed detectors, without having use a standard source beforehand and remove the sensor from the effluent for calibration.
- the calibration of the detectors is made possible by the average free-flow properties of the alpha particles in the effluent and the data available online (salinity, pH, filling rate, number of phases present, etc.) on the effluent at characterize.
- the device and the method according to the invention make it possible to quantify the alpha activity of the effluents. For example, they can be used to monitor the alpha activity of an effluent or to trigger operations when the effluent has the required alpha emitter content.
- FIG. 1 represents the evolution of the signal-to-signal ratio as a function of the energy for an alpha radiation semiconductor detector in water
- FIG. 2 represents an exemplary embodiment of the measuring system according to the invention
- FIG. 3 represents another embodiment of the measuring system according to the invention.
- FIG. 4 shows another embodiment of the measuring system according to the invention.
- the measurement system according to the invention and the associated method make it possible to measure, in situ and in a non-destructive manner, the activity of the alpha radioelements present in solution.
- the originality of the invention is based on the combination of nuclear measurements made using one or more semiconductor detectors of alpha radiation CVD or SOI diamond type, made opaque to visible light (400-800nm) and placed directly in the solution to be characterized (effluent), and the determination of the calibration coefficient of said one or more detectors in a numerical manner (by 3D Monte Carlo calculation code of alpha particle transport).
- This combination makes it possible to obtain an on - line non - destructive measurement of the alpha activity of the radioelements present in the effluent, and in particular in all the phases of the effluent (clean solutions and / or in the sludge of the effluent). effluent) when several detectors are used in the different phases of the effluent, and thus take into account the distribution of radioelements in the effluent.
- the measurement system and the associated method not only make it possible to know the overall alpha activity of an effluent, but can also provide radioelement alpha activity by radioelement when the measuring system comprises a CVD diamond type single crystal semiconductor detector. or SOI diamond dedicated to spectrometry.
- a semiconductor semiconductor crystal type CVD or SOI diamond associated with a measurement path for performing the spectrometric measurement of the effluent, allows to know the proportion of radioelements present in the effluent.
- This monocrystalline semiconductor crystal detector or SOI diamond can optionally be used both to measure the alpha activity and the effluent spectrometry.
- the realization of the calibration of the detector (s) dedicated to the measurement of the alpha activity is obtained by Monte Carlo 3D calculation code.
- the transfer function F links the signal to the total activity of the effluent.
- the transfer function can be decomposed as follows:
- - p (D / V c ) is the probability that a particle emitted in the volume of effluent contained in the tank arrives on the detector (this probability represents the geometric efficiency of the detector);
- - V c is the volume of effluent contained in the tank.
- the probability p (D / V c ) is very low because of the short path of the alpha particles in a liquid.
- the probability p (V c _ s ) can be very large, the probability p (D / V c - s ) is by definition zero.
- the probability p (D / V s ) that a particle is detected, knowing that it has been emitted in the volume V s , defines the geometric efficiency relative to the source volume.
- the probability p (V s ) is equal to the ratio of volumes in the case of a homogeneous distribution of activity.
- the Monte-Carlo 3D calculation code makes it possible to evaluate the quantities p (V s ), p (D / V c ) and p (D / V s ).
- the detection efficiency (i.e., p (C / D) ⁇ p (D / V c )) can then be calculated by the above formulas.
- the M detectors of the alpha radiation of the measuring system are connected to P measurement channels, P being an integer greater than or equal to 1 and less than or equal to M. It will be considered that the detectors of the alpha radiation which are connected by the same channel the same physico-chemical characteristics: the detectors connected to the same measurement channel will therefore be calibrated in the same way. If each alpha-ray detector is connected to its own measurement channel, each detector will be calibrated individually: it will then be possible to obtain a different calibration for each detector, which makes it possible to have a calibration as close as possible to the medium in which the measurement is carried out (clean phase or mud).
- Another data to be determined is the number of channels on which the signal must be integrated. This data has a direct influence on the detection efficiency value. This action optimizes the signal-to-noise ratio.
- FIG. 1 represents the evolution of the signal to noise ratio (pulses measured by an alpha radiation semiconductor detector as a function of the energy, in the case where such a detector is immersed in water. that most of the particles have an energy between 3000 and 7000 keV, the graph is between 0 and 7000 keV.
- the solid squares represent the noise / signal ratio, while the solid curve represents the background noise measured by the detector.
- the background noise is minimal between 2000 and 4800 keV: to detect the maximum of particles a in water, while having a minimum signal / noise ratio, the integration is optimal between 3000 and 6000 keV.
- the (or) semiconductor detector (s), once calibrated, is (are) used to measure the alpha activity of the effluent.
- M being the number of detectors of the alpha radiation of the measuring system
- N is the counting without background noise (in pulse) measured by the detector j
- t being the duration of the count (in seconds) by the detector
- the number of alpha radiation detectors included in the measuring system according to the invention makes it possible to increase the performance of the measuring system in terms of the detection limit.
- This number is to be optimized according to the precision on the measurement that one wishes to obtain, the volume of effluent and also the number of different phases identified to be characterized (it is preferable in this case to have at least one detector per different phases if the volume of effluent allows it). For example, the larger the volume of effluent, the greater the need to increase the number of detectors to increase the accuracy of the measurement of the activity.
- the alpha radiation detectors are arranged at different heights in the effluent in order to detect the presence of a gradient of activity, in the case where the activity is not homogeneous throughout the effluent, for example in the case of decantation.
- the detection efficiency of the measuring device is then no longer determined over the entire volume of the effluent, but per slice of effluent covered by each detector: instead of assuming that the distribution of the alpha activity in the effluent is homogeneous, it is assumed here that the distribution of alpha activity is homogeneous radially and over the entire height of the slice "view" by each alpha semiconductor detector. It is also assumed that the density and the chemical composition of the effluent are constant within the same slice. This slice cutting thus makes it possible to take into account the possible density gradients present in the tank and especially to be able to measure in the bottom deposits with a specific detection efficiency. We can then reduce the uncertainty on the alpha activity and better take into account the parameters influencing the determination of the alpha activity by reducing the randomness due to the taking of samples.
- the presence of a gradient in the tank is easily identified by the presence of a variation of the signal between the alpha radiation detectors when the alpha radiation detectors are identical and connected to counting channels. different (one counting channel for each alpha radiation detector). For this reason, it is preferable to use identical alpha radiation detectors.
- This gradient can be due either to the decantation of the alpha emitters in the tank (especially valid for the aqueous active effluents, of neutral pH), or to the decantation of the suspended matter present in the tank.
- the signal gradient will increase as a function of the depth of the tank. In the second case, this same gradient will decrease. The combination of the two effects counterbalances the gradient.
- the measurement system may also comprise a detector responsible for determining the spectrometry of the effluent and thus identifying the alpha emitting radioelements present in the effluent.
- This detector dedicated to effluent spectrometry is a monocrystalline semi-conductor detector, of the CVD or SOI diamond type.
- This detector is preferably located in the upper part of the tank, that is to say in the cleanest part of the effluent contained in the tank. We hypothesize that the isotopic ratio between the different alpha emitting radioelements is constant throughout the tank.
- the monocrystalline detector or SOI diamond must also have a minimum diameter of 1 inch in order to have a limit of detection compatible with the activity of the tank (detection limit of the order of 100000 Bq per m 3 for particles having energies ranging from 4 to 6 MeV).
- a n is the alpha activity of the emitting radioelement alpha n and% n is the proportion of radioelement n in the effluent relative to other alpha emitting radioelements.
- the proportion% n is determined from the spectrum obtained by the spectrometric detector according to the following ratio:
- N n being the signal obtained for the radioelement n (by the usual techniques of spectrum deconvolution) and N T being the signal obtained in the spectrum zone containing all alpha emitting radioelements (ie on the number of channels used for the determination of the isotopic information).
- the proportion of total alpha emitting radioelement activity can also be determined directly from the following formula:
- FIG. 2 represents a vessel 1 containing an effluent having three different phases 2, 3, 4 and into which is introduced an exemplary embodiment of a measurement system according to the invention.
- the measuring system comprises five alpha radiation detectors 5 (represented by rectangles containing a cross), maintained in the effluent by a holding means 7 having the shape of a tree, that is to say say a central axis and ramifications.
- the alpha radiation detectors 5 are connected to five measurement channels 6, one for each detector and the five measurement channels 6 are connected to an adder means (not shown) (for example a multichannel analyzer, a counting scale. ..).
- the alpha radiation detectors 5 are disposed at the ends of the branches of the tree and are thus maintained at determined heights in the effluent.
- the effluent here comprises three phases different: a clear phase located in the upper part of the tank and in which are located three detectors of the alpha radiation, a hazy phase in which is located an alpha radiation detector and a sludge phase in which is located an alpha radiation detector .
- the holding means are preferably designed to allow the passage of various wiring useful for the proper functioning of the detectors (high voltage power supply, low voltage, signal transport ).
- the armature of the shaft is hollow and serves for the passage of the various cables.
- the detectors are inserted into the ends of the branches so that only the active part of the detectors is in contact with the effluent.
- the shaft is preferably waterproof and resistant to acidic or basic compounds.
- the holding means are a shaft, but any means for maintaining the detector (s) of the alpha radiation at a determined position in the tank are suitable.
- the holding means may be a helical rod on which the alpha radiation detectors could be fixed.
- the alpha radiation detectors are preferably located far from the edges of the tank to facilitate their calibration by avoiding having to take into account the "edge effects".
- an active effluent of 3 m 3 is contained in a tank having a height of 2.3 m and a diameter of 1.3 m.
- a number of 10 alpha radiation detectors is optimal from a cost point of view of the measurement system and performance of said measurement system (detection limit).
- a first study of this tank, and especially its contents, makes it possible to determine the number of different phases present in the tank.
- the filling and the salinity of the tank are for example followed in line by a level indicator and a measure of the salinity.
- the level of the tank determines which detectors are to be activated, that is to say which detectors are totally immersed in the effluent, and the salinity is an indicator of the Apparent density to enter the 3D modeling for the realization of the digital calibration of the detectors.
- the result of this digital calibration provides the detection efficiencies of the ten detectors that are therefore applied individually.
- the use of PIPS type semiconductor detectors is possible with the express condition that the tank or the detector is opaque in the light of day.
- SOI diamond or polycrystalline or monocrystalline CVD detectors are described below.
- the measuring system comprises ten detectors alpha, SOI type diamond or CVD type, arranged in a tank and ten independent measurement channels, each measurement channel being associated with an alpha radiation detector .
- the ten measurement channels are connected to a not shown adder means.
- the alpha radiation detectors are spaced from each other in the direction of the height of the tank, so that the different phases of the effluent can be measured.
- the measurement system is immersed in a tank 1 comprising an effluent having three different phases 2, 3, 4.
- the measuring system comprises, as in the preceding example, ten alpha 5 radiation detectors (represented by rectangles comprising a cross), diamond SOI type or CVD type. It further comprises a monocrystalline detector 15, of the CVD or SOI diamond type, dedicated to the effluent spectrometry (represented by a rectangle comprising a circle)
- ten independent measurement channels 6 and 16 one for each detector and the ten measurement channels 6 connected to the alpha radiation detectors 5 are connected to a means adder not shown.
- the detector dedicated to the spectrometry 15 is placed in the upper part of the tank 1, that is to say in the part of the effluent comprising the least amount of suspended matter. It is specified that the holding means are not shown in FIG.
- a measurement system is made suitable for quantifying the alpha activity of an effluent included in a container of a few hundred cm 3 .
- the container 1 is a SG500 type bottle 8 cm high and 9 cm in diameter.
- the measurement system comprises, for example, three alpha 5, diamond SOI or CVD type detectors, a monocrystalline CVD detector dedicated to spectrometry and two measurement channels (one measurement channel 6 for the three detectors of the alpha 5 radiation and a measurement channel 16 for the detector dedicated to spectrometry 15).
- the alpha radiation detectors are arranged at different heights in the bottle. It is specified that the holding means are not shown in FIG.
- the choice between diamond SOI detectors and CVD detectors for the quantification of alpha activity is based on the container and function of the alpha activity to be quantified. Indeed, if it is desired to quantify effluents having an alpha activity of less than 18.6 M Bq / m 3 , it is preferable for the semiconductor detectors to be SOI-type polycrystalline detectors with a minimum surface area of 1 inch 2. (that is 2.54 cm 2 ). In this case, the container (tank or bottle) must be a light-opaque container or the SOI detector must be made opaque to visible light.
- the semiconductor detectors will preferably be polycrystalline detectors of CVD type. .
- One of the advantages of the invention is that it is equally applicable to alpha emitting radioelements present in containers containing several cubic meters or a few cubic centimeters of effluents, as to neutral, basic or acidic effluents, as well as 'to weak, strong or very strong alpha activities.
- Another advantage of the measuring system according to the invention and of the associated measuring method is that they make it possible to measure the alpha activity in effluent tanks at different levels of the tank and in all the phases present in the tank (clean solution and sludge). This provides a more accurate measurement of the alpha activity of the effluent and is possible to know the gradient of the alpha activity of the effluent within the tank.
- the measurement system and the method according to the invention have many other advantages over the prior art.
- the measurement is performed on a sample of an effluent sample and moreover, it is possible to exploit only the clean phase of the effluent. It is then exposed to obtain a biased activity result, not representative of the actual activity of the effluent in the entire tank.
- the representativeness of the measurement of the alpha activity is much closer to the real value.
- the measuring system it is possible to identify and monitor on line the activity of alpha emitting radioelements present in the effluent. It is also possible to take into account the distribution of the activity at all the levels of the tank thanks to a measurement of activity per homogeneous slice of tank.
- the time required to obtain a measurement of alpha activity is reduced compared to the prior art (the measurement directly in the tank replaces sampling, transport and analysis of the sample).
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Abstract
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Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PL11767996T PL2625548T3 (en) | 2010-10-07 | 2011-10-07 | In situ system for the direct measurement of an alpha radiation, and related method for quantifying the activity of alpha-emitting radionnuclides in a solution |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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FR1058151A FR2965937B1 (en) | 2010-10-07 | 2010-10-07 | IN SITU SYSTEM FOR THE DIRECT MEASUREMENT OF ALPHA RADIATION AND ASSOCIATED METHOD FOR QUANTIFICATION OF ALPHA EMITTING RADIONUCLEID ACTIVITY IN SOLUTION |
PCT/EP2011/067578 WO2012045870A1 (en) | 2010-10-07 | 2011-10-07 | In situ system for the direct measurement of an alpha radiation, and related method for quantifying the activity of alpha-emitting radionuclides in a solution |
Publications (2)
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EP2625548A1 true EP2625548A1 (en) | 2013-08-14 |
EP2625548B1 EP2625548B1 (en) | 2015-02-25 |
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Application Number | Title | Priority Date | Filing Date |
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EP11767996.9A Active EP2625548B1 (en) | 2010-10-07 | 2011-10-07 | In situ system for the direct measurement of an alpha radiation, and related method for quantifying the activity of alpha-emitting radionnuclides in a solution |
Country Status (7)
Country | Link |
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US (1) | US9158011B2 (en) |
EP (1) | EP2625548B1 (en) |
JP (1) | JP6087822B2 (en) |
ES (1) | ES2537630T3 (en) |
FR (1) | FR2965937B1 (en) |
PL (1) | PL2625548T3 (en) |
WO (1) | WO2012045870A1 (en) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
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FR3033039A1 (en) | 2015-02-19 | 2016-08-26 | Commissariat Energie Atomique | METHOD FOR QUANTIFYING THE INTRINSIC DIMENSIONS OF RADIATION SENSORS, IN PARTICULAR IONIZING RADIATION SENSORS, AND DEVICE FOR IMPLEMENTING THE METHOD |
JP7197878B2 (en) * | 2017-10-03 | 2022-12-28 | 国立研究開発法人農業・食品産業技術総合研究機構 | Radioactivity measuring device |
JP7307992B2 (en) * | 2017-10-03 | 2023-07-13 | 国立研究開発法人農業・食品産業技術総合研究機構 | Radioactivity measuring device |
JP7140658B2 (en) * | 2018-12-03 | 2022-09-21 | 日立Geニュークリア・エナジー株式会社 | Radiation measuring device and radiation measuring method |
FR3111714B1 (en) | 2020-06-22 | 2022-10-28 | Commissariat Energie Atomique | System for correlating alpha and gamma spectrometry measurements for in situ radiological characterization of a sample |
Family Cites Families (10)
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GB1253636A (en) * | 1970-04-20 | 1971-11-17 | Central Electr Generat Board | Improvements in or relating to the manufacture of coated particle fuel for nuclear reactors |
JP2591533B2 (en) * | 1990-01-10 | 1997-03-19 | 住友電気工業株式会社 | Radiation detecting element and method of manufacturing the same |
JPH05333155A (en) * | 1992-05-29 | 1993-12-17 | Toshiba Corp | Radioactive concentration measuring method for artificial radioactive nuclide in concrete |
JPH07169988A (en) * | 1993-12-14 | 1995-07-04 | Fuji Electric Co Ltd | Semiconductor radioactive rays detector |
JP3099314B2 (en) * | 1995-07-28 | 2000-10-16 | 株式会社東芝 | Radiation measurement device |
US5689115A (en) * | 1995-11-24 | 1997-11-18 | Elscint Ltd. | Advanced nuclear medicine system |
GB2404780A (en) * | 2003-08-07 | 2005-02-09 | Element Six Ltd | Neutron detector |
JP2008111794A (en) * | 2006-10-31 | 2008-05-15 | Mitsubishi Heavy Ind Ltd | Radioactivity evaluation method, and detection limit evaluation method |
GB0622695D0 (en) * | 2006-11-14 | 2006-12-27 | Element Six Ltd | Robust radiation detector comprising diamond |
US8642944B2 (en) * | 2007-08-31 | 2014-02-04 | Schlumberger Technology Corporation | Downhole tools with solid-state neutron monitors |
-
2010
- 2010-10-07 FR FR1058151A patent/FR2965937B1/en not_active Expired - Fee Related
-
2011
- 2011-10-07 US US13/877,404 patent/US9158011B2/en active Active
- 2011-10-07 ES ES11767996.9T patent/ES2537630T3/en active Active
- 2011-10-07 JP JP2013532222A patent/JP6087822B2/en active Active
- 2011-10-07 EP EP11767996.9A patent/EP2625548B1/en active Active
- 2011-10-07 WO PCT/EP2011/067578 patent/WO2012045870A1/en active Application Filing
- 2011-10-07 PL PL11767996T patent/PL2625548T3/en unknown
Non-Patent Citations (1)
Title |
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See references of WO2012045870A1 * |
Also Published As
Publication number | Publication date |
---|---|
FR2965937B1 (en) | 2013-05-03 |
US20130200267A1 (en) | 2013-08-08 |
ES2537630T3 (en) | 2015-06-10 |
FR2965937A1 (en) | 2012-04-13 |
PL2625548T3 (en) | 2015-07-31 |
EP2625548B1 (en) | 2015-02-25 |
US9158011B2 (en) | 2015-10-13 |
JP6087822B2 (en) | 2017-03-01 |
JP2013543587A (en) | 2013-12-05 |
WO2012045870A1 (en) | 2012-04-12 |
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